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Quartz-dolerite - Wikipedia, the free encyclopedia
An intrusive rock, similar to dolerite, but with an excess of quartz. Dolerite is similar in composition to basalt, which is eruptive (from volcanoes), and gabbro, which is plutonic. The differing cry...
en.wikipedia.org/wiki/Quartz-dolerite |
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Diabase - Wikipedia, the free encyclopedia
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The natural dolerite sample used in this work was obtained from Abeokuta a city in the South West of Nigeria. The sample is a dark grey, fine-grained, ...
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Also dolerite is used as ornamental gemstone with combinations with other colored gemstones such as jasper, charoite, rhodonite and so on for accenting the pattern of these gemstones. In our site you can see the concrete examples of such combination in the directories: jewelry boxes, candelabrums, desk sets and so on.
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In the United States, diabase is also referred to as dolerite. In the United Kingdom, dolerite is used to describe the fresh rock; diabase is used to refer to altered dolerite. Commonly occurs as tabular masses that have been intruded into surrounding rocks.
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diabase ( ) n. A dark-gray to black, fine-textured igneous rock composed mainly of feldspar and pyroxene and used for monuments and as crushed stone ... In continental Europe diabase was reserved by Brongniart for pre-Tertiary (pre-Cenozoic) material[5], with dolerite used for more recent rock.
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It is commonly used for crushed stone. Its resistance to weathering and its general appearance make it a first-class material for monuments. See also Stone and stone products. ... As defined, diabase is equivalent to the British term dolerite. The British term diabase is an altered diabase in ... What can dolerite be used for?
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Dolerite is a medium-grained, mafic, intrusive, igneous rock with a chemical composition similar to that of basalt and gabbro. The rock usually forms In the 19th century, it was used as stone sets for roads and pavements and hardly wears at all. There is still one quarry working which produces material for roadstone".
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Dolerite is a medium-grained (hypabyssal) basalt and forms in shallow intrusions, such as dykes, which cut across the rock strata, and sills, which push between beds of sedimentary ... In the UK the term ‘diabase’ is used as an alternative to dolerite, often implying an altered dolerite, as distinct from fresh rock.
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After all, the yellowish material is commonly used in construction in this area – perhaps elsewhere as well – in clay tennis courts, ballast, fill and gravel roads.
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